Screen



G. E. KRIDER Sept. 2, 1930.

SCREEN Filed Feb. 16, 1929 2 Sheets-Sheet 1 Inventor 6 60961 fild?Attorney Sept. 2, I930. KR|DER 1,774,893

7 v SCREEN Filed Feb. 16, 1929 2 Sheets-Sheet 2 In ventor Patented Sept.2 1 9 30l. j

UNITED; s ATE sf STONE MACHINE COMPANY, OF HOLLIDAYSBURG, PENNSYLVANIA,AGOBIOBATION OF'PENNSYLVANIA v r ,Application filed February ieieze s iial'iwb; 346,444. i

The present invention relates to a screen for-shifting material and hasfor its prime object to vprovide a screen of this nature which ismounted and has a motion imparted thereto for throwing the materialbackand forth across the screen.

A- still further very importa'nt object of the invention resides in theprovision of a' screen offthis nature "in combination with r means formounting the same and imparting simultaneously thereto a transverse anda longitudinal rocking or oscillatory movement. A still further veryimportant object of" .the invention residesfin the provision of an vapparatus of this nature which is exceedingv ly simple in itsconstruction, strong and durable, inexpensive to manufacture,thoroughlyeflicient and reliable in use and operation and otherwise welladapted to the. purpose for whichit isdesigned.

' With the above and I jects in View as will appear as'the descriptionproceeds, the invention resides incertain novel features ofconstruction, 1 and in the", combination and arrangement ofrparts' asW111 be hereinafter more fully-described and claimed. v

Inthe drawing: i i Figurel is aside; elevationof'thea pparatus embodyingthe features of my 111- vention, Y V

Figure 2 is a front elevation thereof.

Figure 3 is a longitudinal vertical section 4 a supporting frame whichin the present instance comprises a rectangular bottom frame 5 with apair of legs 6 rising from the-front corners thereof andaf pair'of legs7 rising from the rear corners thereof ,and being longer than the leg6.: Thenumeralfi'denotes 5 scnnnn" 1 numerous other ob t v a wardly andforwardly andis held in this 1 thereof. v t V t The present embodimentof the invention" 1 having, t e l gs fixed atit eiri pp r-e ds I in fthe front 7 corners thereof While inter -mediate portions of the legs 7"are fixed in the rear corners thereof;

generally the screen "member which jf comprises a rectangular frame 9withja screen or sheet" offoraminous material- 10 mount' ecl therein."Bearings 11 rise hem the g'center GEORGE E; YKRIDER, orDwcmmm,'remsvmmm, Assrenon, Tot MGLANAHANJ .per endsofthe legsYQjTheletter B denotes. f

of theintermediate vportions of the "frame t l i thisiide, i i- 13th l353 51 is journaledthereinfi r po @nhssewnaa iifth bearingsillfareprovidedwith oppositelydist-s posed eccentrics This shaftlQ isjjpurnaledin bearings 15 mounted on the forepart of the maybe-used for-rotatingthe shaft 12. The screen is disposed so as to incline down-' positionbymeans of a plurality of springs;

.side'rails Oftheframe'A f Any suitablemeans I I A spring 16 is attachedtothe front of the frame A and to the front of the frame 9.

similar spring 17 is attached to the front I of the frame 5, Asimilar-spring 18' is attached to the rear of the frame 9 and to therear oftheframe 8., These springs,'therefore, hold the framein saiddownwardly and forwardly inclined position.

Now when rotary motion is imparted to the shaft 12 the, frame 9 rockstransversely and longitudinally at the same time so as to cause thematerial to be'thrown' to and fro across the screen or foraminous sheet10 and greatly this art without'a more detailed description hasbeenhdisclosed in' considerable detail" merely for the purposes v ofexemplification since in actual practice it attains the features ofadvantage enumerated as desirable in the v a I 1,774,893

statement of the invention and the above de- .scription. Y s It will beapparent that changes in the details of construction, and in thecombination and arrangement of parts may be reso-rtedto Withoutdeparting from the spirit orscope of r the invention as hereinafterclaimed or sacrificing any of its advantages.

7 -Having thns described my invention, What m Iclaim as-nevvis:

s Invan apparatus of the classdescribed in- V eluding a supporting framehaving pairs of s front and rear legs, the rear pair of legs' extending.above the front pair of legs and having upper and lowe'r tr'ans'versebrace bars connected to the opposite faces thereof, an inclined tSifter" frame including front and rear iipper. and'lovve'r transversebrace members; a sheet. offoraminons material in the g Sifterframe,bearings on the sifter frame, a

a shaft journaledin the supportingframe and having vertically disposedeccentrics extendi'n'g' opposite directions jonrnalled in bearsingst'oimpart transverse and longitudinal rocking movement to the Sifterframe, coil 7 springs con nected' to the upper and lower reafbr'ace barsof; the sifter frame and an chored -respective'lyEtothe upper vand lowerbrace bars of the supporting frame; upper v and lower eoil. springsconnected to the front up er and lower. bracerbars of the Sifter frame;and'to the supportingframe adjacent to the upper and lower ends thereofvIn testimony whereof I afiix my signature.

' RGE'EVK IDER;

